def __init__(self):
self.api = WinUSBApi()
byte_array = c_byte * 8
self.guid = GUID(
0xA5DCBF10L, 0x6530, 0x11D2,
byte_array(0x90, 0x1F, 0x00, 0xC0, 0x4F, 0xB9, 0x51, 0xED))
self.handle_file = INVALID_HANDLE_VALUE
self.handle_winusb = c_void_p()
self._index = -1
